Metallic ceiling



A. NORTHROP.

METALLIC CEILING.

(No Model.)

No. 299,255. Patented May 27, 1884.

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- corrugated sheet and cap. .In Fig. 2 the sheet part of thisspecification, Figure l is a perspec- UNITED STATES PATENT UEEmE.

ALBERT NORTHROP, OF PITTSBURG, PENNSYLVANIA.

METALLIC CEILING.

SPECIFICATION-forming part of Letters Patent No. 299,255, dated May 27,1884.

Application filed September 19, 1883. No model.)

To all whom it may concern.-

Be it known that I, ALBERT NoRTHRoP, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Metallic Ceilings; and 1 do hereby declare that thefollowing is a full, clear, and exact description thereof, ref erencebeing had to'the accompanying drawings, and to the letters of referencemarked thereon.

My invention relates to an improvement in sheet-iron ceiling or siding;and it consists in providing the edges of the capping or molding withcorrugations or crimps correspond ing in size and form to thecorrugations formed in the sheet or panel over the joints or edges ofwhich the cap or molding may be placed, and also in providing saidsheets or panels with openings of larger diameter than that of the nailsemployed for securing the sheets inplace, said openings and nailscovered with ornamental rosettes, all of which will hereinafter morefully and at large appear.

In the accompanying drawings, which form tive view of a section of a capor molding the edges of which are provided with corrugations. Figs. 2,3, and 4. are perspective views of the is shown provided with openingsfor the reception of nails. These openings are larger than the shank ofthe nail, to admit the expansion and contraction of the corrugatedsheet. Fig. 3 shows the nail-heads protruding from the openings in thesheet. In this view the crimpcd edge of the cap is provided withopenings. Fig. 4. shows ornamental rosettes over the nailheads.

Reference being had to the accompanying drawings, A represents the capor molding, the edges B of which are provided with corrugations orcrimps G, which correspond in form and size to the corrugations in thesheet D, the openings of which are marked e, and the nails for holdingthe sheetin place are marked f, and the rosette which covers the openingand nail is marked g. The ends of the sheets where they engage the capsare provided with openings for the reception of nails. These openingsare represented by the letter h, said openings being larger than thenails, whereby the cap and sheet may expand and @ntract withoutdisplacing the nail. it represents the rosettes on the nails in theedges of the cap.

The advantage of my improvement consists in providing a simple andefiicient means for compensating for the expansion and contraction ofthe sheet metal, thereby avoiding the buckling and contortion of thesheet when secured in position, and also in providing an ornamentalmeans for covering from view the means employed for compensatingcontraction and expansion of said sheets, cap, or molding.

The corrugations or crimps G in the edge of the edges B or cap ormolding A will tend to prevent lateral motion in sheet D, and willimpart at the sametimc an ornamental finish to the combined cap andsheet, giving it the appearance of a single piece of sheet metal whensaid parts are united and in position.

Having thus described my improvement, what I claim as of my inventionis 1. The cap or molding A, the edges B of which are provided withcorrugations or crimps (J, in combination with asheet of metal havingcorrugations or crimps, substantially as hereinbefore described, and forthe purpose set forth.

2. In a metallic ceiling, a cap having corrugated edges, said edgesbeing provided with openings for the reception of nails, in combinationwith a corrugated plate provided on its edge with openings adapted toregister with. the openings in the corrugated cap, said plate and capopenings being larger than the nails, whereby the parts may expand andcontract without displacing the nails, substantially as described, andfor the purposes set forth.

A. NORTHROP. WVitnesses:

A. G. JOHNSTON, J. W. Swoenn.

